Structure and properties of sintered R18 steel

Dorofeev, Yu. G.; Petrov, A. K.; Tsipunov, A. G.; Ustimenko, V. I.; Marinenko, L. G.; Bateneva, M. K.; Orlov, Yu. G.

doi:10.1007/bf00807776

Powder Metall Met Ceram

1973

DOI: 10.1007/bf00807776

|View full text |Cite

Structure and properties of sintered R18 steel

Yu. G. Dorofeev

A. K. Petrov

A. G. Tsipunov

et al.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2001

2020

Publication Types

Select...

Article5

Relationship

Self Cite0

Independent5

Authors

Journals

Cited by 6 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In its properties such steel is not surpassed by standard (cast and deformed) steel of a similar composition. At the same time use of hot forming for preparing a tool billet from atomized powders of high-speed steel, as has been shown by the authors in [2], apart from the apparent advantages is connected with difficulties that are caused primarily by the high chemical affinity of the main alloying elements towards oxygen. An oxide film at the surface of particles formed during heating for forming prevents formation of a high-quality contact surface between particles due to a lack of consolidation of them.…”

mentioning

confidence: 90%

Hot Forming of Powder High-Speed Steels

Baglyuk

2005

Powder Metall Met Ceram

View full text Add to dashboard Cite

The effect of the main production parameters of sintering and subsequent deformation of sintered billets on the structure and level of oxidation of steel after hot forming is studied. It is shown that use of an activating addition (30% boron and 70% nickel powder) in order to protect the sintered material form oxidation during heating for forming is highly efficient.Hot forming of porous billets is an alternative with respect to liquid-phase sintering for preparation of individual billets from high-speed steel powder. At the same time it provides the possibility of forming the fine-grained structure of the material, that is close to the characteristics of high-speed steels prepared by hot isostatic compaction technology in the solid phase temperature range followed by forging, and (or) rolling.High-speed steel with the use of hot forming of porous billets was obtained for the first time by the authors in [1] from turnings as the original material. In its properties such steel is not surpassed by standard (cast and deformed) steel of a similar composition. At the same time use of hot forming for preparing a tool billet from atomized powders of high-speed steel, as has been shown by the authors in [2], apart from the apparent advantages is connected with difficulties that are caused primarily by the high chemical affinity of the main alloying elements towards oxygen. An oxide film at the surface of particles formed during heating for forming prevents formation of a high-quality contact surface between particles due to a lack of consolidation of them. In addition, particles of unreduced oxides in powder steels are stress concentrators that markedly reduce the toughness and ductility of the material. In view of this in the present work a study has been made of the effect of production parameters for sintering and subsequent treatment of sintered billets on the structure and degree of oxidation of steel after hot forming and methods have been developed for reducing its degree of oxidation.Specimens were compacted from steel R6M5K5 powder fraction −400 μm, and also from a mixture of it with 1% activating addition (30% B and 70% Ni) [3]. High-temperature vacuum sintering was performed at 1180-1220°C. After sintering specimens of the first composition had an average density of 6.7 g/cm 3 , and those sintered with an activator had a density of 7.3 g/cm 3 .In order to reduce the possibility of penetration of oxygen through open pores in a billet sintered without an activating addition, before hot forming they were treated according to recommendations in [4] by one of the following methods: impregnation with a paraffin-graphite mixture, coating of the surface with molten glass, and tumbling. After treatment specimens were heated in a silicon carbide furnace in an argon atmosphere to 1050-1180°C for 10 min and subjected to hot forming in a closed die in a cranked press. The heating temperature for forming was selected from the consideration that heating below 1120-1150°C is insufficient in order to consolidate particles of ...

show abstract

mentioning

confidence: 90%

Hot Forming of Powder High-Speed Steels

Baglyuk

2005

Powder Metall Met Ceram

View full text Add to dashboard Cite

show abstract

Expansion on radomyselskii’s Ideas in the Development of Current Processes for Producing Structural Powder Parts

Baglyuk

Dorofeev

Babets

2014

Powder Metall Met Ceram

View full text Add to dashboard Cite

Powder forging in PSRSPU

Dorofeyev

2018

Metal Powder Report

View full text Add to dashboard Cite

The technology of powder forging (PF) gained significant development after the Second World War. In 1990, almost simultaneously, two monographs were published, which examined the scientific and practical aspects of PF [1 , 2] . Kuhn and Ferguson gave a review of the studies on obtaining parts for structural purposes by PF, which were performed in North America and Europe by that time. The monograph by Kuhn and Ferguson published in English is available to a wide circle of specialists in the field of powder metallurgy (PM). Monograph by Dorofeyev Yu. G. et al. was published in Russian, which had limited readership. In this monograph experience in developing PF technology on the territory of the former Soviet Union was extended. For a variety of historical circumstances, the most significant volume of scientific and practical developments of PF was held at the Department of Materials Science and Problematic research laboratory of dynamic hot pressing of the Platov South-Russian State Polytechnic University (PSRSPU). Previously, the University was named the Novocherkassk Polytechnic Institute. Part of the works was performed in collaboration with the Institute for Problems of Materials Science (Kiev, Ukraine) [3] .

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Structure and properties of sintered R18 steel

Cited by 6 publications

References 0 publications

Hot Forming of Powder High-Speed Steels

Hot Forming of Powder High-Speed Steels

Expansion on radomyselskii’s Ideas in the Development of Current Processes for Producing Structural Powder Parts

Powder forging in PSRSPU

Contact Info

Product

Resources

About